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<p>In Serbia, potato and tomato are very important crops, often cultivated in open fields within the same areas. <i>Phytophthora infestans</i>, the causal agent of late blight, is the most devastating disease affecting these two crops worldwide. The distribution of <i>P. infestans</i> populations from potato and tomato was studied during the period 2018–2023 using genetic microsatellite markers. The resulting fingerprints were compared to other European data, identifying four major genotypes: EU_13_A2, EU_36_A2, EU_37_A2 and ‘Others’. It was shown that EU_13_A2 was the dominant genotype in Serbia on potato. However, the fluazinam insensitive EU_37_A2 genotype and the aggressive EU_36_A2 genotype were also detected at low frequencies during the 2018 period. During the 2019–2023 survey period, isolates collected from all potato fields were identified as EU_13_A2 genotype, indicating that this genotype is still well established in western and southern Serbia. In contrast, in the north region, previous <i>P. infestans</i> populations were displaced by new populations of EU_36_A2 which become dominant in this area. On tomato, more genetically diverse genotypes of <i>P. infestans</i>, classified as ‘Others’, were discovered and clustered into three populations. These populations showed geographic differentiation: one was found in Serbia as early as 2014 and in southern Italy in 2018, suggesting that it is a well-established tomato-adapted clone and mainly present in central Serbia. The second group of isolates belonged to a population occurring in the southern part of the country, while the third population was found only in western Serbia. Consequently, further investigation of the epidemiology of <i>P. infestans</i> is necessary to develop more effective and sustainable strategies for managing late blight disease.</p>

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Occurrence and Distribution of the Populations of Phytophthora infestans on Potato and Tomato in Serbia (2018–2023)

  • 期刊论文

  • 发表日期：

    2026年3月30日

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  • Žarko Ivanović,
  • Tijana Jeremić,
  • Danica Žeželj,
  • David E. L. Cooke

摘要

In Serbia, potato and tomato are very important crops, often cultivated in open fields within the same areas. Phytophthora infestans, the causal agent of late blight, is the most devastating disease affecting these two crops worldwide. The distribution of P. infestans populations from potato and tomato was studied during the period 2018–2023 using genetic microsatellite markers. The resulting fingerprints were compared to other European data, identifying four major genotypes: EU_13_A2, EU_36_A2, EU_37_A2 and ‘Others’. It was shown that EU_13_A2 was the dominant genotype in Serbia on potato. However, the fluazinam insensitive EU_37_A2 genotype and the aggressive EU_36_A2 genotype were also detected at low frequencies during the 2018 period. During the 2019–2023 survey period, isolates collected from all potato fields were identified as EU_13_A2 genotype, indicating that this genotype is still well established in western and southern Serbia. In contrast, in the north region, previous P. infestans populations were displaced by new populations of EU_36_A2 which become dominant in this area. On tomato, more genetically diverse genotypes of P. infestans, classified as ‘Others’, were discovered and clustered into three populations. These populations showed geographic differentiation: one was found in Serbia as early as 2014 and in southern Italy in 2018, suggesting that it is a well-established tomato-adapted clone and mainly present in central Serbia. The second group of isolates belonged to a population occurring in the southern part of the country, while the third population was found only in western Serbia. Consequently, further investigation of the epidemiology of P. infestans is necessary to develop more effective and sustainable strategies for managing late blight disease.